| T O P I C R E V I E W |
| andrew.1994 |
Posted - 16/02/2011 : 14:32:06
i was just wondering What corn snake morphs are Co-dominant/dominant?
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| 19 L A T E S T R E P L I E S (Newest First) |
| Adsclarke |
Posted - 21/03/2011 : 22:58:35
quote:
Originally posted by mikerichards
Ultra is recessive, its a form of amel. Tessera is the only co dom morph available.
Hey, just to clarify.. Ultra is actually a hypomelanistic trait rather than an amelanistic trait. Amelanistric removes the black whereas hypomelanistic reduces it in some way.
Both of these genes reside at the same locas and in combination give us Ultramel - a intermediate between the two genes.
Tessera is likely dominant to normal and not co-dominant.
Cheers
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| Adsclarke |
Posted - 21/03/2011 : 22:50:42
Hey all,
Genes can be co-dominant if they reside at the same locus and when there is one of each they show an intermediate look of the two genes.
Amel and Ultra are a good example... Amel and Ultra are co-dominant at a single locus - when you have one copy of Amel and one copy of Ultra you get an Ultramel... This could rightly be considered a co-dominant morph. However both Amel and Ultra are recessive to normal.
This is the same for Motley and Stripe although there is much more variable expression with this combination.
Ian is right with Tessera as well. It appears to be dominant to normal in that one copy of the gene presents visually as a Tessera and even when a second copy is present there appears to be no difference (or a super form).
So to answer OPs questions. Ultramel and Motley/Stripe are co-dominant genes in corn snakes but all are recessive to normal. These could reasonably be considered co-dominant morphs.
Cheers
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| vetdebbie |
Posted - 21/03/2011 : 22:33:37
if you take the pure meaning of codominant, which is 2 different genes at a locus showing equal expression, then ultramel is a codominant morph. |
| mikerichards |
Posted - 18/03/2011 : 00:49:55
quote:
Originally posted by vetdebbie
quote:
Originally posted by mikerichards
quote:
Originally posted by vetdebbie
"Super" is yet another form of codominance which is additive, not present in corns (At this time) although there are of course many examples in royal morphs. If you are talking in respect of these genes to wildtype, they are individually recessive, as I suspect you know. I guess you could describe ultramel as the super form of ultra and amel combined together but that is extremely tentative.
So on that basis, a snow corn is a super amel anery?
what about a hypomel, or a ghost, or hypo lavender.
You cant start calling a combination of recessive genes a codominant, tentative isnt the word you were looking for, wrong is what you were looking for.
You haven't got what I was saying. Amel and anery are not at the same locus so of course they are not codominant. Amel and ultra ARE at the same locus and therefore can be (and are) codominant.
I dont think you got what i was saying, or what the OP asked.
He asked what MORPH is co dominant, the simple answer is there are none, and amel, ultra, whichever, will never be a co dominant morph, what they are to each other is irrelevant in this case. |
| vetdebbie |
Posted - 16/03/2011 : 23:51:09
quote:
Originally posted by mikerichards
quote:
Originally posted by vetdebbie
"Super" is yet another form of codominance which is additive, not present in corns (At this time) although there are of course many examples in royal morphs. If you are talking in respect of these genes to wildtype, they are individually recessive, as I suspect you know. I guess you could describe ultramel as the super form of ultra and amel combined together but that is extremely tentative.
So on that basis, a snow corn is a super amel anery?
what about a hypomel, or a ghost, or hypo lavender.
You cant start calling a combination of recessive genes a codominant, tentative isnt the word you were looking for, wrong is what you were looking for.
You haven't got what I was saying. Amel and anery are not at the same locus so of course they are not codominant. Amel and ultra ARE at the same locus and therefore can be (and are) codominant. |
| mikerichards |
Posted - 05/03/2011 : 15:50:10
quote:
Originally posted by eeji
'super' is a word used by people that don't understand the differences between heterozygous and homozygous in codominant morphs.
Its the same people that use '1 copy' and '2 copy' (usually leopard gecko people) to describe het and homo dominant morphs
Not always, its easier to say super hypo boa, than homozygous hypo boa, bit like saying something is a het, instead of heterozygous for....
het and homo dominants is another matter though, as i recently learned!  |
| eeji |
Posted - 05/03/2011 : 14:30:34
'super' is a word used by people that don't understand the differences between heterozygous and homozygous in codominant morphs.
Its the same people that use '1 copy' and '2 copy' (usually leopard gecko people) to describe het and homo dominant morphs |
| mikerichards |
Posted - 04/03/2011 : 22:39:32
quote:
Originally posted by vetdebbie
"Super" is yet another form of codominance which is additive, not present in corns (At this time) although there are of course many examples in royal morphs. If you are talking in respect of these genes to wildtype, they are individually recessive, as I suspect you know. I guess you could describe ultramel as the super form of ultra and amel combined together but that is extremely tentative.
So on that basis, a snow corn is a super amel anery?
what about a hypomel, or a ghost, or hypo lavender.
You cant start calling a combination of recessive genes a codominant, tentative isnt the word you were looking for, wrong is what you were looking for. |
| vetdebbie |
Posted - 25/02/2011 : 23:56:29
The best example of a non-super form codominant morph I can think of is tortoiseshell cats. Tortoiseshell cats express ginger and black coat colour genes with equal strength. It is just that some areas of the cat's skin express one and some express the other, depending on switching during embryonic development. This results in a patchy coat. |
| vetdebbie |
Posted - 25/02/2011 : 23:51:53
"Super" is yet another form of codominance which is additive, not present in corns (At this time) although there are of course many examples in royal morphs. If you are talking in respect of these genes to wildtype, they are individually recessive, as I suspect you know. I guess you could describe ultramel as the super form of ultra and amel combined together but that is extremely tentative. |
| mikerichards |
Posted - 24/02/2011 : 01:16:31
so whats the super form of amel and ultra then? so what you are saying is that amel and ultra, as a trait are co dominant, so breeding those traits to a normal wild type would give you ultras an amels?? |
| vetdebbie |
Posted - 23/02/2011 : 22:39:53
Actually ultra and amel are codominant. No-one specified any relationship to wild type. |
| eeji |
Posted - 18/02/2011 : 19:44:35
tessera is most likely dominant, theres no 'super' (third phenotype) been hatched out from any tessera x tessera breedings as yet. |
| mikerichards |
Posted - 16/02/2011 : 19:52:23
Ok, however, ultra is still not a co dom or dominant morph! |
| DannyBrown91 |
Posted - 16/02/2011 : 19:46:08
quote:
Originally posted by mikerichards
Yes well done. It is NOT a co dominant trait it is recessive, just because its dominant to amel doesn't make it a dominant, or even a co dominant.
Fair point, although i did say in my original post that ult5ra was co dom with amel but other than that all other genes were recessive. Although i didn't know about tessera. |
| mikerichards |
Posted - 16/02/2011 : 19:01:35
Yes well done. It is NOT a co dominant trait it is recessive, just because its dominant to amel doesn't make it a dominant, or even a co dominant. |
| DannyBrown91 |
Posted - 16/02/2011 : 18:27:30
quote:
Originally posted by mikerichards
Ultra is recessive, its a form of amel. Tessera is the only co dom morph available.
Ultra is recessive on its own, thats why if you breed an amel to an ultra without matching hets you get ultramels. Or atleast thats what i've read online.
Ultra: Inheritance Recessive to normal, co-dominant to Amelanistic |
| mikerichards |
Posted - 16/02/2011 : 17:16:16
Ultra is recessive, its a form of amel. Tessera is the only co dom morph available. |
| DannyBrown91 |
Posted - 16/02/2011 : 16:15:31
Ultra is co-dominant with Amel, but other than that i think all other corn snake genes are recessive. |
